[ 25.267847] BUG: Bad rss-counter state mm:00000000c8c2f93b type:MM_FILEPAGES val:33 [ 25.269344] BUG: Bad rss-counter state mm:00000000c8c2f93b type:MM_ANONPAGES val:22 [ 25.398387] ================================================================== [ 25.399372] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.400380] Read of size 8 at addr ffff88800e4e5798 by task sshd/218 [ 25.401376] [ 25.401603] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.402540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.403587] Call Trace: [ 25.403923] [ 25.404220] dump_stack_lvl+0x91/0xf0 [ 25.404732] print_report+0xcc/0x620 [ 25.405245] ? __virt_addr_valid+0x102/0x340 [ 25.405828] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.406471] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.407130] kasan_report+0xbe/0xf0 [ 25.407600] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.408308] vma_interval_tree_remove+0xc75/0xec0 [ 25.408965] vma_prepare+0xc54/0x11a0 [ 25.409448] __split_vma+0x5af/0x950 [ 25.409930] ? __pfx___split_vma+0x10/0x10 [ 25.410457] ? find_held_lock+0x2c/0x110 [ 25.410972] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.411527] ? lock_is_held_type+0x9f/0x120 [ 25.412055] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.412799] ? mtree_range_walk+0x632/0x900 [ 25.413365] ? mas_walk+0x5c7/0x7c0 [ 25.413881] do_vmi_munmap+0x1f1/0x2b0 [ 25.414376] mmap_region+0x1f9/0x2660 [ 25.414897] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.415406] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.416161] ? __pfx_lock_acquire+0x10/0x10 [ 25.416690] ? __pfx_mmap_region+0x10/0x10 [ 25.417243] ? security_mmap_addr+0x7d/0xa0 [ 25.417814] ? get_unmapped_area+0x1f5/0x3f0 [ 25.418359] do_mmap+0x854/0xf00 [ 25.418798] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.419323] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.419903] ksys_mmap_pgoff+0x3af/0x500 [ 25.420414] do_syscall_64+0x3f/0x90 [ 25.420893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.421564] RIP: 0033:0x7f5a8b4fed82 [ 25.422025] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 25.424220] RSP: 002b:00007fff581d4b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.425191] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a8b4fed82 [ 25.426033] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a8a938000 [ 25.426910] RBP: 00007f5a8a938000 R08: 0000000000000009 R09: 0000000000001000 [ 25.427786] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b9375bec0 [ 25.428623] R13: 00007fff581d4b60 R14: 00007fff581d4b90 R15: 00007fff581d4ef0 [ 25.429521] [ 25.429814] [ 25.430030] Allocated by task 211: [ 25.430457] kasan_save_stack+0x22/0x50 [ 25.430956] kasan_set_track+0x25/0x30 [ 25.431491] __kasan_slab_alloc+0x59/0x70 [ 25.432012] kmem_cache_alloc+0x16b/0x370 [ 25.432563] vm_area_dup+0x20/0x160 [ 25.433038] __split_vma+0x170/0x950 [ 25.433510] split_vma+0xc6/0x110 [ 25.433995] mprotect_fixup+0x8d2/0xb30 [ 25.434492] do_mprotect_pkey+0x87e/0xd40 [ 25.435011] __x64_sys_mprotect+0x78/0xc0 [ 25.435567] do_syscall_64+0x3f/0x90 [ 25.436042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.436676] [ 25.436890] Freed by task 211: [ 25.437289] kasan_save_stack+0x22/0x50 [ 25.437791] kasan_set_track+0x25/0x30 [ 25.438279] kasan_save_free_info+0x2b/0x50 [ 25.438805] __kasan_slab_free+0x10a/0x190 [ 25.439332] kmem_cache_free+0x10d/0x4d0 [ 25.439920] rcu_core+0x8c8/0x2860 [ 25.440442] __do_softirq+0x1b7/0x7d4 [ 25.440914] [ 25.441171] Last potentially related work creation: [ 25.441764] kasan_save_stack+0x22/0x50 [ 25.442358] __kasan_record_aux_stack+0x8e/0xa0 [ 25.442928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.443564] remove_vma+0x139/0x170 [ 25.444070] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.444734] do_vmi_munmap+0x1f1/0x2b0 [ 25.445244] __vm_munmap+0x138/0x3a0 [ 25.445714] __x64_sys_munmap+0x59/0x80 [ 25.446212] do_syscall_64+0x3f/0x90 [ 25.446688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.447324] [ 25.447538] The buggy address belongs to the object at ffff88800e4e5740 [ 25.447538] which belongs to the cache vm_area_struct of size 168 [ 25.449114] The buggy address is located 88 bytes inside of [ 25.449114] freed 168-byte region [ffff88800e4e5740, ffff88800e4e57e8) [ 25.450600] [ 25.450820] The buggy address belongs to the physical page: [ 25.451511] page:00000000ecba207c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4e5 [ 25.452591] memcg:ffff88800cb71c01 [ 25.453064] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.453765] page_type: 0xffffffff() [ 25.454246] raw: 0100000000000200 ffff88800879fc80 ffffea00003aa740 dead000000000007 [ 25.455172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb71c01 [ 25.456107] page dumped because: kasan: bad access detected [ 25.456808] [ 25.457031] Memory state around the buggy address: [ 25.457603] ffff88800e4e5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.458505] ffff88800e4e5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 25.459358] >ffff88800e4e5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 25.460239] ^ [ 25.460773] ffff88800e4e5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 25.461650] ffff88800e4e5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 25.462528] ================================================================== [ 25.463662] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.726461] BUG: Bad rss-counter state mm:00000000bd5bb136 type:MM_FILEPAGES val:33 [ 27.727635] BUG: Bad rss-counter state mm:00000000bd5bb136 type:MM_ANONPAGES val:22 [ 28.186820] BUG: Bad rss-counter state mm:00000000438ecee4 type:MM_FILEPAGES val:33 [ 28.188168] BUG: Bad rss-counter state mm:00000000438ecee4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21698' (ECDSA) to the list of known hosts. 2023/06/19 21:51:13 fuzzer started 2023/06/19 21:51:13 dialing manager at localhost:44161 2023/06/19 21:51:13 checking machine... 2023/06/19 21:51:13 checking revisions... [ 28.843752] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:51:14 testing simple program... [ 28.897189] cgroup: Unknown subsys name 'net' [ 28.984304] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:51:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000008000 RDI=00007ffc6662edc0 RBP=00007ffc6662edc0 RSP=00007ffc6662ed88 R8 =0000000000000000 R9 =0000000000000000 R10=000055b7f7efc5e0 R11=0000000000000202 R12=00000000ffffffff R13=0000000000000000 R14=00007ffc6662edc0 R15=00007f792ee24a84 RIP=00007f792e76bf86 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f792e2f5900 00000000 00000000 GS =0000 0000000000000000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f792e8ad0b0 CR3=000000001bc16000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=ffffffffffffff00ffffffffffffffff XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb1082 RBX=ffffffff85d88414 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff88806cf09990 R8 =ffffffff86088c1a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88420 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fd81a4f71b0 CR3=00000000090c0000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=33728216cd103f9472486296a16d6b10 XMM02=000000000011d360ec2efd57dc4c00df XMM03=00000000001236487696e44a55b2d1e0 XMM04=9aebbfd41de7389500000000000ae988 XMM05=751b9502027dc0b900000000001331a8 XMM06=bdf2e299e47b49d50000000000133030 XMM07=e042d86d42eb936e00000000001238c8 XMM08=7696e44a55b2d1e0000000000011d3c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000